Strumigenys offina

AntWiki: The Ants --- Online
Strumigenys offina
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Strumigenys
Species: S. offina
Binomial name
Strumigenys offina
Bolton, 2000

Strumigenys offina casent0900868 p 1 high.jpg

Strumigenys offina casent0900868 d 1 high.jpg

Specimen Labels

The two non-type collections of this species are from wet forest litter-samples.

Identification

Bolton (2000) - A member of the koningsbergeri complex in the Strumigenys koningsbergeri-group. This is the only species in the group to lack humeral hairs; see notes under Strumigenys koningsbergeri.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.
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Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.
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Biology

Template:Strumigenys

Castes

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • offina. Strumigenys offina Bolton, 2000: 850, fig. 444 (w.) BORNEO.

Worker

Holotype. TL 2.4, HL 0.71, HW 0.64, CI 90, ML 0.30, MI 42, SL 0.35, SI 55, PW 0.31, AL 0.66. With characters of koningsbergeri-complex. Upper scrobe margin from immediately behind frontal lobe expanded into a lamellate flange that is about equal to maximum width of scape (usually best seen in oblique ventral view). Upper scrobe margin with a jagged appearance as the small curved hairs that fringe the margin each arises from a low triangular tubercle; irregular appearance is enhanced by a ragged indentation or concavity of the margin at the level of the eye; eye itself not visible in full-face view. Pronotal humeral hair absent. Dorsal alitrunk completely lacking standing hairs: short erect hairs absent from both pronotum and mesonotum (some non-paratypic workers with a minute erect pair on mesonotum). Katepisternum smooth, remainder of pleurae and side of propodeum usually finely reticulate-punctate, but in some a smooth patch present on metapleuron. Lamella on propodeal declivity broad, its posterior (free) margin usually convex below level of spiracle, less commonly more or less straight. On middle and hind legs bullae of femoral glands usually absent, at most minute and very indistinct. Standing hairs on first gastral tergite narrowly spatulate or at least with their apical portions flattened and weakly expanded.

Paratypes. TL 2.3-2.5, HL 0.68-0.75, HW 0.60-0.67, CI 85-90, ML 0.30-0.31, MI 40-44, SL 0.32-0.36, SI 53-57, PW 0.29-0.32, AL 0.60-0.70 (8 measured).

Type Material

Holotype worker, Malaysia: Sarawak, 4th Division, Gn. Mulu N. P., 830 m., v.-viii.1978, B. M. 1978-49 (P. M. Hammond & J. E. Marshall) (The Natural History Museum). Paratypes. 17 workers with same data as holotype (BMNH, Museum of Comparative Zoology, Musee d'Histoire Naturelle Genève).

Description

References

  • Bolton, B. 2000. The ant tribe Dacetini. Memoirs of the American Entomological Institute. 65:1-1028. (page 850, fig. 444 worker described)

References based on Global Ant Biodiversity Informatics

  • Bolton, B. 2000. The Ant Tribe Dacetini. Memoirs of the American Entomological Institute 65
  • Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58